William flynn



(No Model.)

W. PLYNN.

STONE SAWING MACHINE.

Patented July 24, 1888.

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T/WZnesses gww UNTTTED STATES PATENT OF ICE.

XVILLIAM FLYNN, OF NE\V YORK, N. Y., ASSIGNOR OF ONE-HALF TO THADDEUS A.JACKSON, OF SAME PLACE.

STONE-SAVVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 386,532, dated July 24,1888.

Application filed September 17, 1887. Serial No. 249,973.

To all whom, it may concern.-

Be it known that I, \VILLIAM FLYNN, a citizen of the United States,residing at the city of New York, in the county of New York and State ofNew York, have invented a new and useful Improvement in Stone SawingMacl1ines,of which the following is a specification.

The nature of the invention consists in the combination,with thereciprocating saw of a stone sawing machine, of a rod extending throughthe whole length of the edge of said saw, running in bearings attachedto said saw, as hereinafter fully described, and armed with diamond-bort and similarly hard material, which, while revolving around its ownaxis, moves lengthwise with said saw in its reciprocating motion, and,being guided thereby, becomes the cutting-edge thereof.

The nature of the invention also consists in the details ofcombinationand construction substantially as illustrated in the drawings,hereinafter described, and subsequently pointed out in the claim.

Figure 1 is a side view, in elevation, illustrating a part of astone-sawing machine constructed according to myinvention. Fig. 2 is adetail view, in section, illustrating the connection of the saw and itscuttingsurface, more fully hereinafter to be described. Figs. 3 and 4are sectional details illustrating how the cutting-diamonds arefastened.

A designates the stationary frame of the saw; B, the reciprocatingsaw-sash; C, the blade of the saw, and P the pitman by which motion iscommunicated from the drivingcrank to the sawsash. As the said crankforms no part of my invention, it is not here illustrated. This saw ismounted and strained in the usual and well-known way and fed down andwithdrawn by feed-screws 0 0, working in nuts 3 yin the common andwell-known way. The lower edge of this saw is cut with a series ofnotches, in which are placed the plates 1) b. yond the edge of the sawand are each grooved, as illustrated in Fig. 2, the direction of thegroove being parallel to the blade of the saw. The cylindrical rod (1,which is mounted in bearings upon the sash B, revolves in the series ofshort grooves formed in the edges of These plates extend a little be (Nomodel.)

the plates [1, as illustrated in section in Fig. 2, so that the groovein each of said plates 1) forms a smooth bearing for said cylindricalrod (0 to run in. The diamonds may be either cast in this rod, asillustrated in Fig. 4, or &

fastened by compressing the outer edge of the hole in which they areset, as illustrated in Fig. 3. The grooves in the plates I), in whichthe rod a revolves, act as so many guides to keep the rod in positionwhile it is in motion, and, as the rod a rotates and the saw 0 moves inits reciprocating motion, carrying the revolving rod with it, hold therod steadily against the stone, so that it becomes the cutting-edge ofthe saw. The shafts e and e are mounted in convenient bearings, one oneach side of the saw-sash. Upon these shafts are mounted thebevel-wheels c and 0. These wheels have each a groove upon its hub, extending all around the hub, which are embraced by the arms 2 and .2,which arms are rigidly attached to the feed-nuts yand 9, so that whenthe saw is moved upward or downward by the motion of the feed -nuts thewheels 0 and c are carried with it. A key in each hub runs in alongitudinal groove in the shaft on which it is mounted. These wheels 0and c mesh into the wheels 01 and d, which are mounted on the ends ofthe rod a, and on account of the motion just described these wheels arekept in constant engagement with each other. Rotary motion iscommunicated to this mechanism by the shaft h, which is journaled insuitable hearings on the saw-sash B and moves with said sash in itsreciprocating motion. The end hof this shaft,which is a four-sidedprism, is adapted to a similarlyformed boss in the sleeve H, and movesback and forth therein as carried by the saw-sash B in its reciprocatingmotion. The sleeve H is turned by the power to which it may be connectedin any common and well-known way. Upon the shaft h are mounted thebevel-wheels gand 9. These mesh into the bevel-wheelsf andf on theshafts e and e, and thus motion is transmitted from the power, throughthe shaft It, the bevel-wheels g gff, the shafts c e, and thebevel-wheels c c and d d, to the rod a. If the rod a should stretch orswag a little, it may be strained up by turning ICO the nuts :0 and x,which are adapted to work on the ends of said rod.

The whole device is to be as illustrated in the drawings. 7

This invention is to be used as stone-sawing machines of its classusually are.

I am aware that heretofore a flat or square rod of metal twisted andmounted in bearings upon the reciprocating sash of a stone-sawingmachine has been used for the cuttingedge of a stone-saw by causing saidtwisted rod to make alternate revolutions in opposite directions, andusing it in connection with sand and g ater. I do not claim such aconstruction;

ut V 7 What I do claim, and desire to secure by Letters Patent, isa Thecombination,with the reciprocating saw of a stone-sawing machine andbearing-plates, substantially as specified, fastened at convenientdistances along the edge of said saw, of a cylindrical rod extendingthrough the whole length of the-edge of said saw, mounted in hearings onthe sash of said saw, runnlng 1n bearings in said bearing-plates uponthe edgev WILLIAM FLYN N Witnesses:

B. VON BULTzINGsLiiWoEY, F. W. RUBIEN.

